O2
G28G91Z0
T2M6
G54G17G49G40G90G80
M3S2000
G43G1Z100H2F2000
X-9.5Y0
Z5
Z0F1500
#1=0
N10 #1=#1+0.5
G3X-9.5Y0Z-#1I9.5J0F1500

G1X-15.5
Y-15.5
X15.5
Y15.5
X-15.5
Y0

X-9.5

IF[#1LT5]GOTO10
G3I9.5

G49G1Z100
M5
M99